/* ============================================================
   ANIMATIONS.CSS — Southeastern Construction Co
   Scroll reveals, counters, tab transitions, hero keyframes
   ============================================================ */

/* ── Hero Keyframes ────────────────────────────────────── */
@keyframes heroFadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50%       { opacity: 1;   transform: scaleY(1.15); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

/* ── Particle dots ─────────────────────────────────────── */
.particle {
  position: absolute;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0;
  animation: floatParticle linear infinite;
}

@keyframes floatParticle {
  0%   { opacity: 0; transform: translateY(0) scale(0.5); }
  10%  { opacity: 0.3; }
  90%  { opacity: 0.15; }
  100% { opacity: 0; transform: translateY(-120vh) scale(1.2); }
}

/* ── Scroll Reveal Base ────────────────────────────────── */
.reveal-fade,
.reveal-up,
.reveal-left,
.reveal-right {
  transition: opacity var(--dur-slow) var(--ease-out),
              transform var(--dur-slow) var(--ease-out);
}

/* Initial (hidden) states */
.reveal-fade {
  opacity: 0;
}

.reveal-up {
  opacity: 0;
  transform: translateY(40px);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-50px);
}

.reveal-right {
  opacity: 0;
  transform: translateX(50px);
}

/* Visible states — triggered by IntersectionObserver adding .is-visible */
.reveal-fade.is-visible {
  opacity: 1;
}

.reveal-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

/* Stagger delays for grid items */
.reveal-up:nth-child(1) { transition-delay: 0ms; }
.reveal-up:nth-child(2) { transition-delay: 80ms; }
.reveal-up:nth-child(3) { transition-delay: 160ms; }
.reveal-up:nth-child(4) { transition-delay: 240ms; }

/* ── Tab Panel Transition ──────────────────────────────── */
.tab-panel {
  animation: none;
}

.tab-panel.active {
  animation: tabReveal 0.4s var(--ease-out) both;
}

@keyframes tabReveal {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── Gallery Track Transition ──────────────────────────── */
.gallery-track {
  will-change: transform;
}

/* ── Counter animation — handled by JS ─────────────────── */
.stat-number {
  display: block;
}

/* ── Hover shimmer on cards ────────────────────────────── */
.testimonial-card,
.about-badge {
  transition: border-color var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out),
              transform var(--dur-base) var(--ease-spring);
}

.testimonial-card:hover {
  transform: translateY(-4px);
}

/* ── Scroll line animation ──────────────────────────────── */
@keyframes scrollLine {
  0%   { transform: scaleY(0); transform-origin: top; opacity: 0; }
  40%  { transform: scaleY(1); transform-origin: top; opacity: 1; }
  60%  { transform: scaleY(1); transform-origin: bottom; opacity: 1; }
  100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

/* ── Accent glow pulse on buttons ──────────────────────── */
@keyframes glowPulse {
  0%, 100% { box-shadow: 0 4px 24px rgba(232, 100, 10, 0.3); }
  50%       { box-shadow: 0 4px 40px rgba(232, 100, 10, 0.6); }
}

.btn-primary {
  animation: glowPulse 3s ease-in-out infinite;
}

.btn-primary:hover {
  animation: none;
}